CN101621356A - Wireless communication apparatus and packet transfer method thereof - Google Patents
Wireless communication apparatus and packet transfer method thereof Download PDFInfo
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- CN101621356A CN101621356A CN200910139650A CN200910139650A CN101621356A CN 101621356 A CN101621356 A CN 101621356A CN 200910139650 A CN200910139650 A CN 200910139650A CN 200910139650 A CN200910139650 A CN 200910139650A CN 101621356 A CN101621356 A CN 101621356A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
- H04L1/008—Formats for control data where the control data relates to payload of a different packet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/009—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location arrangements specific to transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0091—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location arrangements specific to receivers, e.g. format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0094—Bus
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Abstract
The invention provides a wireless communication apparatus and packet transfer method thereof. A WUSB host (or a WUSB device) transmits a combined information packet and a combined packet to the WUSB device (or the WUSB host). The combined information packet is specified with each packet length of a plurality of packets having a packet length other than a predetermined transfer unit or different packet length. The combined packet is the plurality of packets combined. At this time, the WUSB host transmits the combined information packet to a control endpoint included in the wireless USB device and transmits the combined packet to a bulk OUT endpoint. The WUSB device (or the WUSB host) divides the combined packet into the plurality of packets based on the combined information packet.
Description
Technical field
The present invention relates to a kind of radio communication device and block transmission method thereof, and be specifically related to a kind of being suitable for according to the radio communication device and the block transmission method thereof of Wireless USB (USB) standard at main frame and communication between devices.In follow-up explanation, in order to distinguish with the USB that takes wired connection, Wireless USB is called as " WUSB ".
Background technology
The open No.2007-88775 (Kogure) of the uncensored patent application of Japan discloses a kind of correlation technique that is used in the transmitted in packets of the wireless communication system that adopts the WUSB standard.To this correlation technique be described with reference to Figure 10 hereinafter.
Wireless communication system shown in Figure 10 comprises PC (personal computer) 1, and this PC1 is a main process equipment; Host machine wired adapter (being called as HWA hereinafter sometimes) 2, this HWA2 is connected to the radio communication device USB device 3 of PC1; And equipment has line adapter (being called as DWA hereinafter sometimes) 4, and this DWA4 is connected to the radio communication device of USB device 3.Between HWA2 and DWA4, carry out radio communication.
Described from the example of the operation of the transmitted in packets of USB device 3 to PC1.At first, USB device 3 receives the data transmission instruction that comes from PC1 via HWA2 and DWA4.In response to this data transmission instruction, USB device 3 generates the packet PD1 to PD3 that will sequentially be offered DWA4.
As shown in figure 10, tentation data grouping PD1 and PD2 have predetermined unit of transfer's length, and packet PD3 is the length short grouping littler than predetermined unit of transfer's length.In this case, DWA4 specified data grouping PD3 is last grouping in this transmission, and combination will be transmitted to the packet PD1 to PD3 of HWA2.
HWA2 becomes will sequentially be offered the original data packet PD1 to PD3 of PC1 with the packet fragmentation that is made up.
Summary of the invention
Yet the inventor has had been found that the problem in the above-mentioned correlation technique: if the packet that is transmitted comprises many short groupings, the efficiency of transmission of packet is lowered so.Described this problem in detail with reference to figure 11A and 11B.
Figure 11 A show when USB device 3 will be the packet PD1 to PD3 of the short grouping operation example in the above-mentioned correlation technique when transferring to PC1.And, the transmission example that Figure 11 B shows the packet PD1 to PD3 from DWA4 to HWA2 and be transferred to MMC (fine setting degree supervisory instruction) the grouping P11 to P13 of DWA4 from HWA2 before transmission of data packets PD1 to PD3.MMC grouping P11 to P13 is specific data phase place period (channel time) DF1 to DF3 respectively, and described DF1 to DF3 is the transmitted period that is used for the packet PD1 to PD3 of DWA4.More specifically, each MMC grouping comprises about control information, the data transfer direction of CTA (channel time allocation) and the application model that is used for each channel time.That is, the MMC grouping is the set of token packet.As for operation, DWA4 at first receives the packet PD1 from USB device 3.Because the block length of packet PD1 is less than unit of transfer's length, so DWA4 specified data grouping PD1 is last grouping and packet PD1 is emitted to HWA2.At this moment, shown in Figure 11 B, by the MMC grouping P11 data designated phase place period DF1 that receives from HWA2, DWA4 transmission of data packets PD1.
Next, DWA4 receives the packet PD2 less than unit of transfer's length, and in by MMC grouping P12 data designated phase place period DF2 packet PD2 is emitted to HWA2.At last, DWA4 receives the packet PD3 less than unit of transfer's length, and in by MMC grouping P13 data designated phase place period DF3 packet PD3 is transferred to HWA2.
Like this, transmitting in the period at mutual different data phase is the packet PD1 to PD3 of short grouping.Shown in Figure 11 B, there is the predetermined blank period between the period at data phase, thereby requires to have the more transmission time along with the number increase of short grouping.
In addition, the WUSB standard definition following method (this method is called as the data burst method sometimes hereinafter).In this data burst method, packet with the maximum packet unit that tentatively is assigned to an end points, perhaps continuously being transferred to be included in equipment as a unit of transfer with the packet of increment from 512 to 3584 bytes of 512 bytes during data phase place period has line adapter or has merged the equipment that is equivalent to a described end points (such as the communication buffer of memory or register) in the WUSB equipment of function that line adapter is arranged.Yet, if any packet that will transmit is short grouping, so whenever transmission course is just cut apart in short grouping when occurring.And, if the block length of packet satisfies the condition of above-mentioned unit of transfer, but have different value (for example the block length of packet PD1 to PD3 is respectively 512 bytes, 1024 bytes and 1536 bytes), cut apart transmission course in each packet so.As a result, carry out transmission course by each that cut apart, thereby reduce the efficiency of transmission of packet in the different data phase periods.
Especially when the wired adapter of use equipment is formed wireless communication system, main frame need be launched and is used for request msg and transfers to the transmission request grouping that the equipment of being connected to has the USB device of line adapter, and confirms the transmission result packet that receives in response to transmission request grouping.In main frame and communication between devices, use many short groupings.Therefore, when the short grouping of cutting apart the transmission operation occurs, emission/reception transmission request grouping and transmission result packet.Relevant therewith, switch transmission direction (the WiMedia standard that the WUSB standard adopts needs the switching time of 10 μ sec as wireless communications method) continually.Therefore, further reduced efficiency of transmission.Above problem is not limited to transmit short grouping, and is equally applicable to transmit the situation of the packet of different grouping length.
In addition, identical end points is normally used for transmission transmission request grouping and packet.Yet because block length differs from one another, institute thinks that the transmission request is divided into groups and transmission course has been cut apart in packet.Therefore, transmission request grouping is transmitted in the period and is not transmitted in a data phase place period at different data phases with packet.Particularly, shown in Figure 12 A, in case on the down link from the main frame to equipment (going out (OUT)) direction, transmitted packet PD1 to PD4, then different data phases transmit in the period request grouping P51, packet PD1 and transmission result packet P61 ..., transmission request grouping P54, packet PD4 and transmission result packet P64.
In the transmitted in packets on up link (going into (IN)) direction, identical end points is used to transmission transmission result packet and packet, and described transmission result packet indication is from the acquisition result of the data of USB device.Equally in this case, because its block length differs from one another, institute thinks that transmission result packet and packet cut apart transmission course.Therefore, request grouping and packet have been transmitted in the period at different data phases.Particularly, shown in Figure 12 B, different data phases transmitted in the period request grouping P51 and transmission result packet P61, packet PD1 ..., transmission request grouping P54 and transmission result packet P64, packet PD4.
Notice, as another kind of correlation technique, the open No.2006-243866 (Matsuda) of the uncensored patent application of Japan discloses a kind of communication means, wherein, for fear of the frequent repeating transmission of identical data packet, the token packet and the packet packing that will come from main frame have line adapter to be emitted to equipment from main frame.Yet, in the WUSB standard, the MMC grouping and the packet of several token packet of transmission packing individually as mentioned above.Therefore, be difficult to the disclosed communication means of Matsuda is applied to radio communication device according to the executive communication between main frame and equipment of WUSB standard.
An illustrative aspects of embodiments of the invention is a kind of radio communication devices that comprise the combined information packet transmitter, and this combined information packet transmitter is transmitted into another radio communication device with the combined information grouping.Each block length of a plurality of groupings that combined information grouping is designated, described a plurality of groupings have block length except scheduled transmission unit or different block lengths.Radio communication device also comprises the combination packet transmitter, and this combination packet transmitter will make up grouping and be transmitted into another radio communication device.The combination grouping is a plurality of groupings of combination.
Another illustrative aspects of embodiments of the invention is a kind of radio communication device that makes up package receiver that comprises, this combination package receiver receives combined information grouping and combination grouping.Each block length of a plurality of groupings that combined information grouping is designated, described a plurality of groupings have block length except scheduled transmission unit or different block lengths, and the combination grouping is a plurality of groupings of combination.Radio communication device also comprises combination packet fragmentation device, and this combination packet fragmentation device divides into groups to make up packet fragmentation based on combined information and becomes a plurality of groupings.
Another illustrative aspects of embodiments of the invention is a kind of method that the combined information grouping is emitted to the transmission grouping of radio communication device.Each block length of a plurality of groupings that combined information grouping is designated, described a plurality of groupings have block length except predetermined unit of transfer or different block lengths.This method also will make up grouping and be emitted to radio communication device.The combination grouping is a plurality of groupings of combination.
Another illustrative aspects of embodiments of the invention is a kind of method that receives combined information grouping and the grouping of combination transmission packets.Each block length of a plurality of groupings that combined information grouping is designated, described a plurality of groupings have block length except predetermined unit of transfer or different block lengths, and the combination grouping is a plurality of groupings of combination.This method is also divided into groups to make up packet fragmentation based on combined information and is become a plurality of groupings.
That is, in the transmitted in packets side, short grouping of combination and emission or grouping with different grouping length are together with its packet-length information.At the grouping receiver side, the reference packet length information makes that will make up packet fragmentation becomes original grouping.Therefore, can transmit each grouping at identical data phase in the period.
Compare with above-mentioned correlation technique and data burst method, the invention enables and to reduce the transmitted in packets time in large quantities, thereby improve the transmitted in packets efficient between main frame and equipment.
Description of drawings
In conjunction with the accompanying drawings, according to the following description of certain exemplary embodiments, above and other illustrative aspects, advantage and feature will be more apparent, in the accompanying drawings:
Fig. 1 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the radio communication device of first exemplary embodiment of the present invention;
Fig. 2 A to 2C shows the example in the data packet transmission operation of the main frame from radio communication device to the outgoing direction of equipment according to first exemplary embodiment of the present invention;
Fig. 3 A to 3B shows the example according to the effect that obtains the time from the data packet transmission that is reduced of first exemplary embodiment of the present invention in radio communication device;
Fig. 4 shows the example in the data packet transmission operation of the equipment from wireless communication system to the Inbound of main frame according to first exemplary embodiment of the present invention;
Fig. 5 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the radio communication device of second exemplary embodiment of the present invention;
Fig. 6 A to 6C shows the example in the data packet transmission operation of the main frame from radio communication device to the outgoing direction of equipment according to second exemplary embodiment of the present invention;
Fig. 7 shows the example in the data packet transmission operation of the equipment from wireless communication system to the Inbound of main frame according to second exemplary embodiment of the present invention;
Fig. 8 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the radio communication device of the 3rd exemplary embodiment of the present invention;
Fig. 9 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the radio communication device of the 4th exemplary embodiment of the present invention;
Figure 10 is the sequence chart that illustrates according to the example of the operation of the data packet transmission in the wireless communication system of correlation technique;
Figure 11 A and 11B are the figure that is used to explain the problem of correlation technique; And
Figure 12 A and 12B are used for explaining the time diagram of problem of data packet transmission operation that the wireless communication system of line adapter is arranged at use equipment.
Embodiment
Hereinafter, will be with reference to figure 1,2A to 2C, 3A, 3B, 4,5,6A to 6C and 7 to 9 first to fourth exemplary embodiments of describing according to radio communication device of the present invention.In the accompanying drawings, in order clearly to explain, identical assembly to be representing with the Reference numeral that wherein those assemblies are identical, and omitted as required and be repeated in this description.
[first exemplary embodiment]
[ios dhcp sample configuration IOS DHCP]
Wireless communication system shown in Figure 1 is made up of PC10 and WUSB equipment 20, and PC10 is as the WUSB main frame.Between PC10 and WUSB equipment 20, carry out radio communication.
And PC10 comprises CPU110, memory 120, chipset 130 and 140 and WHCI (wireless host control unit interface) 150.CPU110 generates packet so that the various functions that provided by WUSB equipment 20 to be provided.The generative process (this grouping is called as the combined information grouping hereinafter) of the grouping of the packet-length information of the anabolic process of CPU110 actual figure data grouping (grouping that obtains by this process is called as the combination grouping hereinafter), designated each packet and the cutting procedure of combination grouping.Memory 120 storage packets.Chipset 130 interconnects CPU110 and memory 120.Chipset 140 is connected to chipset 130 via DMI (Desktop Management Interface) bus or the like, and control peripheral devices.WHCI150 is connected to chipset 140 via PCI (peripheral component interconnect) bus or PCIe (PCI quick (PCI Express)) bus.
WHCI 150 comprises register 151, WUSB console controller 152, WiMedia MAC unit 153 and WiMedia PHY unit 154.For processing command and data provide register 151.WUSB console controller 152 generates MMC grouping and grouping of transmission combined information and combination grouping according to the order from CPU110.WiMedia MAC unit 153 divides into groups MMC grouping, combined information grouping and combination that mac header is added into slave controller 152 outputs respectively, so that delta frame.Define mac header by the WiMedia standard.And WiMedia MAC unit 153 removes the mac header of the frame that receives from WUSB equipment 20, so that extract combined information grouping and combination grouping.WiMedia PHY unit 154 will convert wireless signal to launch via antenna ANT1 by the frame that MAC unit 153 generates.And framing will be changed via the wireless signal that antenna ANT1 receives in WiMedia PHY unit 154.
Notice that equipment, LAN (local area network (LAN)) equipment, USB device, audio frequency apparatus that meets SATA (Serial Advanced Technology Attachment) standard or the like can be connected to said chip group 140.
On the other hand, WUSB equipment 20 comprises WiMedia PHY unit 210, WiMediaMAC unit 220, WUSB end points 230, WUSB controller 240 and functional unit 250.WUSB controller 240 generates combined information grouping and combination grouping, and cuts apart the combination grouping.Functional unit 250 provides various functions based on (receiving from PC10) packet of slave controller 240 outputs.
[operation example]
To explain the operation of this embodiment hereinafter.At first, be described in the example (1) of data packet transmission operation on the outgoing direction from PC10 to WUSB equipment 20 with reference to figure 2A to 2C, 3A and 3B.Then, be described in the example (2) of the data packet transmission operation on the Inbound with reference to figure 4.
[data packet transmission operation example (1)]
At first, CPU110 in PC10 generates combination grouping P3 and combined information grouping P2, combination grouping P3 is made up of " n " number destination data grouping PD1 to PDn that makes up shown in Fig. 2 A, the combined number (=" n ") of packet in combination grouping P3 that combined information grouping P2 is designated and the block length of the packet PD1 to PDn shown in Fig. 2 B.Then, CPU110 is stored in combination grouping P3 and the combined information grouping P2 that is generated in the memory 120.At this moment, the register 151 of CPU110 in WHCI150 specifies indication that divide into groups P2 and combination grouping P3 of combined information is transmitted into the order of WUSB equipment 20.It is designated that WUSB console controller 152 identifies this order, and the combined information grouping P2 and the combination grouping P3 that will be stored in the memory 120 via chipset 130 and 140 read out to register 151.Packet PD1 to PDn is less than by unit of transfer's (they are 512 bytes, 1024 bytes, 1536 bytes, 2048 bytes, 2560 bytes, 3072 bytes and 3584 bytes) of WUSB standard definition or tentatively be assigned to the short grouping of the block length of the maximum that goes out end points 232 in batches, the perhaps grouping of different grouping length.
And before emission combined information grouping P2 and combination grouping P3, WUSB console controller 152 generates the MMC grouping P1 that will be provided for WiMedia MAC unit 153.Shown in Fig. 2 A, MMC grouping P1 comprises the relevant information element W of channel time that distributes with being used to launch combined information grouping P2
DRCTA[1], the relevant information element W of channel time that distributes with being used to launch combination grouping P3
DRCTA[2] and be used to receive the relevant information element W of channel time that distributes from the handshake packet (replying ACK) of WUSB equipment 20
DTCTA.WiMedia MAC unit 153 is added into MMC grouping P1 with mac header.Then, WiMedia PHY unit 154 converts the MMC P1 that divides into groups to will be launched into WUSB equipment 20 wireless signal.Notice that the header in MMC grouping P1 comprises the launch time of next MMC grouping, identification information of indication MMC grouping or the like.
Information element W
DRCTA[1], W
DRCTA[2] and W
DTCTA has the form shown in Fig. 2 C.At at information element W
DRCTA[1] in end points number, block type and the emission time started identification number, the indication W that have specified control end points 231 shown in Figure 1 respectively
DRThe code value of CTA and the time that obtains by the emission deadline addition that will be scheduled to guard time T1 and MMC grouping P1.At at information element W
DRCTA[2] in end points number, block type and emission time started specified identification number, the indication W that goes out end points 232 in batches respectively
DRThe code value of CTA and the time that obtains by emission deadline addition with guard time T1 and MMC grouping P2.And, at information element W
DTEnd points number among the CTA, block type and emission time started have been specified identification number, the indication W that goes out end points 232 in batches respectively
DTThe code value of CTA and the time that obtains by the emission deadline addition with SIFS (short interFrameGap) time and combination grouping P3, described SIFS is above-mentioned switching time of the T2 of transmission direction.
Then, at information element W
DRCTA[1] in the emission time started place of appointment, WUSB console controller 152 is transmitted into WUSB equipment 20 via WiMedia MAC unit 153 and WiMedia PHY unit 154 with the combined information P2 that divides into groups.Therefore, in WUSB equipment 20, the combined information P2 that divides into groups is stored in the control end points 231 via WiMedia PHY unit 210 and WiMedia MAC unit 220.
Afterwards, at information element W
DRCTA[2] in the emission time started place of appointment, WUSB controller 152 will make up the P3 that divides into groups and be transmitted into WUSB equipment 20.Therefore, in WUSB equipment 20, combination grouping P3 is stored in batches to go out in the end points 232.
And WUSB controller 240 generates the ACK grouping P4 that will be stored in to go out in batches in the end points 232.WiMedia MAC unit 220 identifies ACK grouping and is stored, and via WiMedia PHY unit 210 the ACK P4 that divides into groups is transmitted into PC 10 then.Therefore, ACK grouping P4 arrives the CPU110 among the PC10.Particularly, WUSB console controller 152 divides into groups with ACK that P4 is stored in the register 151 and generates at CPU110 to interrupt, thereby finishes transmission.
Like this, short grouping or the grouping with different grouping length can be transferred to WUSB equipment 20 from PC10 at identical data phase in the period.Use goes out end points 232 in batches and is used for transmission combination grouping P3, and use control end points 231 is used to transmit combined information grouping P2.Therefore, can transmit combined information grouping P2 and combination grouping P3 in the period at identical data phase.Notice,, can use different batches to go out end points so and be used to transmit combined information grouping P2 and combination grouping P3 if exist several to go out end points in batches.
Therefore, in this embodiment, compare, can reduce in large quantities and divide into groups the needed time at the outgoing direction transmitting data with above-mentioned correlation technique and data burst method.
More specifically, in above-mentioned correlation technique and data burst method, as shown in Figure 3A, 4 data grouping PD1 to PD4 that consideration will be transmitted are respectively the examples of the short grouping of 511 bytes, 510 bytes, 509 bytes and 508 bytes.For transmission of data packets PD1; cost total time " 86.125 microseconds (μ sec) "; this total time by P11 that MMC is divided into groups the transmission time=" 26.25 μ sec ", guard time T1=" 3 μ sec ", packet PD1 the transmission time=" 22.5 μ sec " (wherein, in current WUSB standard with emission rate " 480Mbps " the transmission of data packets PD1 of maximum), SIFS time T 2=" 10 μ sec " and ACK grouping P41 transmission time P41=" 24.375 μ sec " addition and obtain.MMC grouping P11 comprise by main frame designated the information element W of emission time started of packet PD1
DRCTA and by equipment designated the information element W of emission time started of ACK grouping P41
DTCTA.Packet PD2 to PD4 needs the identical transmission time.Yet transmission of data packets PD1 to PD4 in by the different pieces of information phase place period of MMC grouping P11 to P14 appointment as mentioned above.Therefore, if the transmission interval of MMC grouping is " 128 μ sec ", cost " 512 μ sec (128 μ sec * 4) " comes transmission of data packets PD1 to PD4 so.
On the other hand, in this embodiment, shown in Fig. 3 B, cost total time " 137.875 μ sec (transmission interval " 128 μ sec " of the MMC grouping shown in＞Fig. 3 A) the identical packet PD1 to PD4 of transmission.This total time by P11 that MMC is divided into groups the transmission time=" 26.25 μ sec " (because it has little amount of information; even so have an additional information element, the transmission time in fact also is identical); guard time T1=" 3 μ sec "; combined information grouping P2 the transmission time=" 22.5 μ sec "; guard time T1=" 3 μ sec "; the transmission time (511 byte+510 byte+509 byte+508 bytes)=" 48.75 μ sec " of the combination grouping P3 of 2038 bytes; SIFS time T 2=" 10 μ sec " and ACK grouping P41 the transmission time=" 24.375 μ sec " addition and obtaining.The information element W of the emission time started that MMC grouping P11 comprises combined information grouping P2 designated
DRCTA[1], the information block W of emission time started of designated combination grouping P3
DRCTA[2] and the information element W of emission time started of designated ACK grouping P41
DTCTA.In this case, the MMC transmission packets must be modified at interval " 256 μ sec ".Yet, compare with Fig. 3 A, can be reduced to " 256 μ sec (512 μ sec-256 μ sec) " (in other words, efficiency of transmission is doubled) transmission time of packet PD1 to PD4.Because the combined number of packet increases, so that this effect seems is better).Notice in this example, combined information grouping P2 is the grouping of 10 bytes, wherein uses block length " 511 bytes ", " 510 bytes ", " 509 bytes " and " 508 bytes " of 2 byte representation combined number " 4 " and packet PD1 to PD4 respectively.
[data packet transmission operation example (2)]
As for the operation of the data packet transmission on Inbound, the WUSB console controller 152 in PC10 shown in Figure 1 at first generates the MMC grouping P1 that will be transmitted to WUSB equipment 20 via WiMedia MAC unit 153 and WiMedia PHY unit 154.As shown in Figure 4, MMC grouping P1 comprises and is used to receive that combined information from WUSB equipment 20 divides into groups P2 and the relevant information element W of channel time that distributes
DTCTA[1] with the relevant information element W of channel time that distributes with being used to receive combination grouping P3
DTCTA[2].Notice that WUSB console controller 152 generates MMC grouping P1 by the order (at the ordering norms of register 151) that receives from CPU 110 as triggering.
At at information element W
DTCTA[1] in end points number, block type and emission time started (referring to Fig. 2 C) identification number, the indication W that have specified control end points 231 respectively
DTThe code value of CTA and the time that obtains by emission deadline addition with SIFS T2 and MMC grouping P1.At at information element W
DTCTA[2] in end points number, block type and emission time started specified identification number, the indication W that goes into end points 233 in batches respectively
DTThe code value of CTA and the time that obtains by emission deadline addition with guard time T1 and combined information grouping P2.
On the other hand, the functional unit in WUSB equipment 20 250 has generated " n " number destination data grouping PD1 to PDn shown in Figure 4 that will be provided for WUSB controller 240.Packet PD1 to PDn is less than by the unit of transfer of WUSB standard definition or be assigned to the short grouping of block length of the maximum of going in batches end points 233 or the grouping of different grouping length at first.
Then, by information element W
DTCTA[1] the emission time started place of appointment, WUSB console controller 240 has generated combined information grouping P2, the block length of this combined information grouping P2 the is designated combined number of packet PD1 to PDn (=" n ") and each packet PD1 to PDn.Then, WUSB controller 240 with combined information divide into groups P2 be stored in control end points 231 in.Therefore, via WiMedia MAC unit 220 and WiMedia PHY unit 210 the combined information P2 that divides into groups is emitted to PC10.
Afterwards, passing through information element W
DTCTA[2] the emission time started place of appointment, WUSB controller 240 has generated combination grouping P3, and this combination grouping P3 is the packet PD1 to PDn that makes up.Then, WUSB controller 240 will make up grouping P3 and be stored in to go in the end points 233 in batches.Therefore, combination grouping P3 is transmitted to PC10.
Like this, short grouping or the grouping with different grouping length can be transferred to PC10 from WUSB equipment 20 at identical data phase in the period.Use and to go into end points 233 in batches and transmit combination grouping P3, and use control end points 231 to transmit combined information grouping P2.Therefore, can transmit combined information grouping P2 and combination grouping P3 in the period at identical data phase.Notice,, can use different batches to go into end points so and transmit combined information grouping P2 and combination grouping P3 if exist several to go into end points in batches.
Therefore, compare, divide into groups the needed time with the same can the minimizing in large quantities on outgoing direction at the Inbound transmitting data with above-mentioned correlation technique and data burst method.
[second exemplary embodiment]
[ios dhcp sample configuration IOS DHCP]
The difference of the wireless communication system shown in Figure 5 and first exemplary embodiment is: use equipment has line adapter (DWA) 30 and is connected to " k " number purpose USB device 40_1 to 40_k (being collectively referred to as code 40 hereinafter sometimes) replacement WUSB equipment 20 shown in Figure 1 of adapter 30.In this wireless communication system, between PC10 and DWA30, carry out radio communication.
Each comprises USB buffer 410_1 to 410_k (being collectively referred to as code 410 hereinafter sometimes) between the functional unit 430_1 to 430_k (being collectively referred to as code 430 hereinafter sometimes) that is provided at DWA 30, USB end points 420_1 to 420_k (being collectively referred to as code 420 hereinafter sometimes) and various functions are provided at PC 10 USB device 40_1 to 40_k.
And, DWA 30 and WUSB equipment 20 are the same to comprise WiMedia PHY unit 310, WiMedia MAC unit 320 and WUSB end points 330, and comprises the long-range pipeline of " m " number purpose 340_1 to 340_m (be called as RPIPE hereinafter and be collectively referred to as code 340 sometimes), WUSB controller 350, usb host controller 360 and be provided at USB buffer 370 between the USB device 40.RPIPE 340 be provided for be included in USB device 40 in USB end points 420 communicate by letter.WUSB end points 330 and RPIPE340 are read and write to WUSB controller 350 control from WUSB end points 330 and RPIPE 340, generates the combined information grouping, and generate and cut apart the combination grouping.Usb host controller 360 control USB device 40.
[operation example]
To explain the operation of this embodiment hereinafter.At first, with reference to figure 6A to 6C example (1) in the data packet transmission from the outgoing direction of PC 10 to DWA 30 has been described.The example (2) of the data packet transmission on Inbound has been described with reference to figure 7 then.
[data packet transmission operation example (1)]
At first, as shown in Figure 6A, the CPU110 combination in PC10 asks DWA30 with transmission request grouping P5 and " n " number destination data grouping PD1 to PDn of transfer of data to USB device 40, makes up grouping P3a thereby generate.Shown in Fig. 6 B, CPU110 generates combined information grouping P2a, this combined information grouping P2a the is designated combined number of the grouping in combination grouping P3a (=transmission request grouping number " 1 "+number of data packets " n "), the block length of transmission request grouping P5 and the block length of packet PD1 to PDn.The same with first exemplary embodiment, CPU110 is stored in divide into groups P2a and combination grouping P3a of combined information in the memory 120.Then, WUSB controller 152 is read them from memory 120.Packet PD1 to PDn is less than by the unit of transfer of WUSB standard definition or be assigned to the short grouping of block length of the maximum that goes out in batches end points 332 or the grouping of different grouping length at first.
Shown in Fig. 6 C, in transmission request grouping P5, the identification number of RPIPE, the size (this size is total size of packet PD1 to PDn) that is transferred to the data of RPIPE, transmission direction (being outgoing direction in this example) or the like have been specified.Notice that in a single day CPU110 has carried out initialization process or the like and just controlled WUSB console controller 152, thereby obtain the identification number of the RPIPE in USB device 40 and the corresponding relation between the USB end points 420.
And before emission combined information grouping P2a and combination grouping P3a, WUSB console controller 152 generates the MMC grouping P1 that will be transmitted to DWA30 via WiMedia MAC unit 153 and WiMedia PHY unit 154.As shown in Figure 6A, MMC grouping 1 comprises the relevant information element W of channel time that distributes with being used to launch combined information grouping P2a
DRCTA[1], the relevant information element W of channel time that distributes with being used to launch combination grouping P3a
DRCTA[2] and be used to receive from the transmission result packet P6 of DWA30 and the relevant information element W of channel time that distributes
DTCTA.
At at information element W
DRCTA[1] in end points number, block type and emission time started (referring to Fig. 2 C) identification number, the indication W that have specified control end points 331 respectively
DRThe code value of CTA and the time that obtains by emission deadline addition with predetermined guard time T1 and MMC grouping P1.At at information element W
DRCTA[2] in end points number, block type and emission time started specified identification number, the indication W that goes out end points 332 in batches respectively
DRThe code value of CTA and the time that obtains by emission deadline addition with guard time T1 and combined information grouping P2a.And, at information element W
DTEnd points number among the CTA, block type and emission time started have been specified identification number, the indication W that goes into end points 333 in batches respectively
DTThe code value of CTA and time by SIFS time T 2 and the emission deadline addition of making up grouping P3a are obtained.
Afterwards, at information element W
DRCTA[1] in the emission time started place of appointment, WUSB console controller 152 is emitted to DWA 30 via WiMedia MAC unit 153 and WiMedia PHY unit 154 with the combined information P2a that divides into groups.Then, in DWA 30, the combined information P2a that divides into groups is stored in the control end points 331 via WiMedia PHY unit 310 and WiMedia MAC unit 320.
At information element W
DRCTA[2] in emission time started of appointment, WUSB console controller 152 will make up the P3a that divides into groups and be emitted to DWA30.Therefore, in DWA30, will make up grouping P3a and be stored in batches to go out in the end points 332.
At this moment, WUSB controller 350 is stored in packet PD1 to PDn and asks among the corresponding RPIPE of identification number of appointment among the grouping P5 in transmission, and 360 packets of notice usb host controller are stored.Usb host controller 360 is sense data grouping PD1 to PDn from RPIPE, and by USB buffer 370 they is offered USB device 40.
And WUSB controller 350 generates the transmission result packet P6 that will be stored in to go in batches in the end points 333.WiMedia MAC unit 320 identifies the transmission result packet and is stored, and will transmit result packet P6 via WiMedia PHY unit 310 then and be emitted to PC10.Therefore, transmission result packet P6 arrives the CPU110 in PC10.
Like this, short grouping or the grouping with different grouping length can be transferred to DWA30 together with transmission request grouping from PC10 at identical data phase in the period.Use goes out end points 332 in batches and is used for transmission combination grouping P3a, and use control end points 331 is used to transmit combined information grouping P2a.Therefore, can transmit combined information grouping P2a and combination grouping P3a in the period at identical data phase.Notice,, can use different batches to go out end points so and be used to transmit combined information grouping P2a and combination grouping P3a if exist several to go out end points in batches.
Therefore, in this embodiment, even when the wired adapter of use equipment is formed wireless communication system, compare with above-mentioned correlation technique and data burst method (especially Figure 12 A), also can reduce in large quantities and divide into groups the needed time at the outgoing direction transmitting data.
[data packet transmission operation example (2)]
As for the transmission of the transmission of data packets on Inbound operation, the CPU110 in PC10 shown in Figure 5 at first generates (shown in Figure 7) transmission request grouping P5 at DWA30.This transmission request grouping P5 once was stored in the memory 120.By receiving order from CPU110 as triggering, usb host controller 152 generates the MMC grouping P1 that will be transmitted to (shown in Figure 7) DWA30 via WiMedia MAC unit 153 and WiMedia PHY unit 154W.MMC grouping P1 comprises the relevant information element W of channel time that distributes with being used to launch transmission request grouping P5
DRCTA, be used to receive the relevant information element W of channel time that distributes from the combined information grouping P2b of DWA30
DTCTA[1] and the relevant information element W of channel time that distributes with being used to receive combination grouping P3b
DTCTA[2].
At at information element W
DRIdentification number, the indication W that goes out end points 332 in batches specified in end points number among the CTA, block type and emission time started (referring to Fig. 2 C) respectively
DRThe code value of CTA and the time that obtains by emission deadline addition with guard time T1 and MMC grouping P1.At at information element W
DTCTA[1] in end points number, block type and the emission time started identification number, the indication W that have specified control end points 331 respectively
DTThe code value of CTA and time by asking the emission deadline addition of grouping P5 to obtain SIFS time T 2 and transmission.And, at information element W
DTCTA[2] in end points number, block type and emission time started specified identification number, the indication W that goes into end points 333 in batches respectively
DTThe code value of CTA and the time that obtains by emission deadline addition with guard time T1 and combined information grouping P2b.
At information element W
DRThe emission time started place of CTA appointment, the transmission request grouping P5 that WUSB console controller 152 will be read from memory 120 is emitted to DWA30.
The packet PD1 to PDn that WUSB controller 350 will be read from RPIPE 340 is combined with the acquisition result's of designated packet from usb host controller 360 notices transmission result packet P6, thereby generates combination grouping P3b.And, as shown in Figure 7, WUSB controller 350 generates combined information grouping P2b, combination grouping number (=transmission result packet number " 1 "+number of data packets " n "), the block length of transmission result packet P6 and the block length of packet PD1 to PDn in combination grouping P3b that this combined information grouping P2b is designated.
By information element W
DTCTA[1] the emission time started place of appointment, WUSB controller 350 is stored in the combined information P2b that divides into groups in the control end points 331.Therefore, via WiMediaMAC unit 320 and WiMedia PHY unit 310 the combined information P2b that divides into groups is emitted to PC10.
Afterwards, by information element W
DTCTA[2] the emission time started place of appointment, WUSB controller 350 will make up grouping P3b and be stored in batch and go in the end points 333.Therefore, combination grouping P3b is transmitted to PC10.
Like this, short grouping or the grouping with different grouping length can be transferred to PC10 together with the transmission result packet from DWA30 at identical data phase in the period.Use is gone into end points 333 in batches and is used for transmission combination grouping P3b, and use control end points 331 is used to transmit combined information grouping P2b.Therefore, can transmit combined information grouping P2b and combination grouping P3b in the period at identical data phase.Notice,, can use different batches to go into end points so and be used to transmit combined information grouping P2b and combination grouping P3b if exist several to go into end points in batches.
Therefore, even when the wired adapter of use equipment is formed wireless communication system, compare with above-mentioned correlation technique and data burst method (especially Figure 12 B), divide into groups the needed time with the same also can the minimizing in large quantities on outgoing direction at the Inbound transmitting data.
[the 3rd exemplary embodiment]
The difference of the wireless communication system shown in Figure 8 and first exemplary embodiment is: use host machine wired adapter (HWA) 50 to replace WHCI150 shown in Figure 1.HWA50 is connected to chipset 140 by usb protocol.In this wireless communication system, between HWA50 and DWA30, carry out radio communication.
Control HWA50 as USB device (that is, PC10 is as usb host) by the usb host controller (not shown) in chipset 140.HWA50 comprises the USB buffer 510 that is provided between PC 10, USB end points 520, RPIPE 530, USB controller 540, WUSB console controller 550, WiMedia MAC unit 560 and the WiMedia PHY unit 570.USB controller 540 control is from USB end points 520 and RPIPE 530 reads and write to USB end points 520 and RPIPE 530.WUSB console controller 550 generates MMC grouping and grouping of transmission combined information and combination grouping.
As in the operation of the data packet transmission from the outgoing direction of HWA 50 to WUSB equipment 20, divide into groups at first to be stored in the USB end points 520 via USB buffer 510 by combined information grouping and combination that the CPU in PC 10 110 generates.USB controller 540 identifies the combined information grouping and the combination grouping is stored.Then, USB controller 540 is read combined information grouping and the combination grouping that is stored in the USB end points 520, and they are stored among the RPIPE 530.Simultaneously, USB controller 540 notice WUSB console controllers 550: combined information grouping and combination grouping are stored among the RPIPE 530.The same with usb host controller 152 shown in Figure 1, usb host controller 550 is emitted to combined information grouping and combination grouping respectively the control end points 231 in the WUSB equipment 20 and goes out end points 232 in batches.The same with first exemplary embodiment, WUSB equipment 20 obtains to come from the original data packet of combination grouping.
On the other hand, operate as for the data packet transmission on Inbound, with with the similar mode of WUSB console controller shown in Figure 1 152, WUSB console controller 550 receives combined information grouping and the combination grouping that comes from WUSB equipment 20, and they are stored among the RPIPE 530.USB controller 540 identifies the combined information grouping and the combination grouping is stored.Then, USB controller 540 is read combined information grouping and the combination grouping that is stored among the RPIPE 530, and they are stored in the USB end points 520, thereby via USB buffer 510 combined information grouping and combination grouping is offered PC 10.The same with first exemplary embodiment, the CPU 110 in PC 10 has obtained to come from the original data packet of combination grouping.
The same with above-mentioned first exemplary embodiment, compare with above-mentioned correlation technique and data burst method, can reduce the needed time of transmission of data packets in large quantities.
[the 4th exemplary embodiment]
Wireless communication system shown in Figure 9 is made up of PC shown in Figure 8 10 and HWA 50 and DWA 30 and USB device 40 shown in Figure 5.Between HWA 50 and DWA 30, carry out radio communication.
As for operation, the CPU 110 in PC 10, the WUSB console controller 550 in HWA 50 and DWA 30 carry out the processing of explaining in second exemplary embodiment.And, WUSB console controller 550 also with USB controller 540 mutual operation of in the 3rd exemplary embodiment, explaining.
Therefore, the same with second exemplary embodiment, even when the wired adapter of use equipment is formed wireless communication system, compare, also can reduce the data packet transmission time in large quantities with above-mentioned correlation technique and data burst method (especially Figure 12 A and 12B).
Though described the present invention, person of skill in the art will appreciate that the present invention can utilize and carry out various modifications implement in the spirit and scope of claim, and the present invention is not limited to above-mentioned example according to some exemplary embodiments.
And the scope of claim is not subjected to the restriction of above-mentioned exemplary embodiment.
In addition, noticing that the applicant is intended to contain the equivalent of all key elements of asking for protection, also is like this even in the checking process in later stage claim was carried out revising.
Those skilled in the art can make up first to fourth exemplary embodiment as required.
Claims (18)
1. radio communication device comprises:
The combined information packet transmitter, described combined information packet transmitter is transmitted into another radio communication device with the combined information grouping, each block length of a plurality of groupings that the grouping of described combined information is designated, described a plurality of groupings have block length except scheduled transmission unit or different block lengths; And
The combination packet transmitter, described combination packet transmitter will make up grouping and be transmitted into described another radio communication device, and described combination grouping is described a plurality of groupings of combination.
2. radio communication device according to claim 1, wherein, described another radio communication device is that Wireless USB (USB) equipment or the equipment that is connected with USB device have line adapter,
Described combined information packet transmitter is transmitted into the grouping of described combined information and is included in described wireless USB apparatus or described equipment first end points in the line adapter is arranged, and
Described combination packet transmitter is transmitted into described combination grouping and is included in described wireless USB apparatus or described equipment second end points in the line adapter is arranged.
3. radio communication device according to claim 2, wherein, described first end points is the end points that is used to control, and
Described second end points is the end points that is used to receive data.
4. radio communication device according to claim 1, wherein, described another radio communication device is that the equipment that is connected with USB device has line adapter, and
Described a plurality of grouping comprises that request is with the grouping of transfer of data to described USB device.
5. radio communication device according to claim 1, wherein, described radio communication device obtains described a plurality of grouping from the USB device that is connected to described device itself.
6. radio communication device according to claim 5, wherein, described combined information packet transmitter comprises the block length of indication from the acquisition result's of the data of described USB device grouping in described combined information grouping, and
Described combination packet transmitter is combined with the acquisition result's of the described data of indication grouping with described a plurality of groupings.
7. radio communication device comprises:
The combination package receiver, described combination package receiver receives combined information grouping and combination grouping, each block length of a plurality of groupings that described combined information grouping is designated, described a plurality of grouping has block length except scheduled transmission unit or different block lengths, and described combination grouping is described a plurality of groupings of combination; And
Combination packet fragmentation device, described combination packet fragmentation device becomes described a plurality of grouping based on described combined information grouping with described combination packet fragmentation.
8. radio communication device according to claim 7, wherein, described another radio communication device is that wireless USB apparatus or the equipment that is connected with USB device have line adapter, and
Described combination package receiver has first end points and second end points the line adapter to receive described combined information grouping and described combination grouping from being included in described wireless USB apparatus or described equipment respectively.
9. radio communication device according to claim 8, wherein, described first end points is the end points that is used to control, and
Described second end points is the end points that is used to launch data.
10. method of transmitting grouping comprises:
Combined information grouping is transmitted into radio communication device, each block length of a plurality of groupings that described combined information grouping is designated, described a plurality of groupings have block length except scheduled transmission unit or different block lengths; And
To make up grouping and be transmitted into described radio communication device, described combination grouping is described a plurality of groupings of combination.
11. method according to claim 10 wherein, has line adapter if described radio communication device is wireless USB apparatus or the equipment that is connected with USB device, described method further comprises:
The grouping of described combined information is transmitted into is included in described wireless USB apparatus or described equipment first end points in the line adapter is arranged; And
Described combination grouping is transmitted into is included in described wireless USB apparatus or described equipment second end points in the line adapter is arranged.
12. method according to claim 11, wherein, the end points that is used to control is used as described first end points, and
The end points that is used to receive data is used as described second end points.
13. method according to claim 10 wherein, has line adapter if described radio communication device is the equipment that is connected with USB device, then described method further comprises:
Comprise that in described a plurality of groupings request is with the grouping of transfer of data to described USB device.
14. method according to claim 10 wherein, obtains described a plurality of grouping from USB device.
15. method according to claim 14 further comprises:
In described combined information grouping, comprise the block length of indication from the acquisition result's of the data of described USB device grouping; And
Described a plurality of groupings are combined with the acquisition result's of the described data of indication grouping.
16. a method of transmitting grouping comprises:
Receive combined information grouping and combination grouping, each block length of a plurality of groupings that described combined information grouping is designated, described a plurality of grouping has block length except scheduled transmission unit or different block lengths, and described combination grouping is described a plurality of groupings of combination; And
Based on described combined information grouping described combination packet fragmentation is become described a plurality of grouping.
17. method according to claim 16 wherein, has line adapter if described radio communication device is wireless USB apparatus or the equipment that is connected with USB device, then described method further comprises:
There are first end points and second end points the line adapter to receive described combined information grouping and described combination grouping from being included in described wireless USB apparatus or described equipment respectively.
18. method according to claim 17, wherein, the end points that is used to control is used as described first end points, and
The end points that is used to launch data is used as described second end points.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008169904 | 2008-06-30 | ||
| JP2008169904A JP2010011255A (en) | 2008-06-30 | 2008-06-30 | Wireless communication apparatus, and packet transfer method thereof |
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| CN101621356A true CN101621356A (en) | 2010-01-06 |
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| JP (1) | JP2010011255A (en) |
| CN (1) | CN101621356A (en) |
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| CN104737145A (en) * | 2012-11-20 | 2015-06-24 | 英特尔公司 | Transmitting an interrupt packet |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102009030952A1 (en) | 2010-01-07 |
| JP2010011255A (en) | 2010-01-14 |
| US20090323723A1 (en) | 2009-12-31 |
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